The correct option is (a) True
The best explanation: In an oblique shock diffuser, the accelerated flow is slowed down by a series of oblique shock waves followed by slowing down of the flow by a weak normal wave at the end of the diffuser. Therefore, the static pressure at the exit of the diffuser is equal to p∞. The pressure recovery in case of an oblique shock diffuser is greater because of lower total pressure loss compares to the normal shock diffuser.